Construct · 3 fields · 7 citations
One name. Different field. Different construct. One map.
● jingle · one word, three constructs Nearest construct by meaningadherencecompare the meaningsEvery construct on the map is compared with every other by the meaning of its definitions, and the closest one is surfaced here. The nearest construct to fidelity is adherence.
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Erikson introduced fidelity in his 1964 book Insight and Responsibility as the ego strength, or virtue, that emerges when an adolescent works through the crisis of identity: the capacity to sustain freely pledged loyalties despite the contradictions among competing value systems. His 1968 Identity: Youth and Crisis fixed it as the specific human strength of the adolescent stage, the ability to be true to a chosen commitment. Here fidelity is a developmental achievement in a person, a disposition of loyalty and truthfulness, not a number comparing two quantum states or a rating of how closely a program was delivered.[1][2]
The quantity now called fidelity originates with Uhlmann's 1976 paper The "transition probability" in the state space of a *-algebra, which defined a measure of overlap between two quantum states that still works when the states are mixed. Jozsa's 1994 Fidelity for Mixed Quantum States named this measure fidelity and laid out the properties it should satisfy, and it is now standard in quantum computing for judging how close a prepared or transmitted state is to a target. Here fidelity is a number between zero and one comparing two physical states, used to rate state transfer and gate operations, not a personal virtue or a rating of how faithfully a social program was run.[3][4]
Fullan and Pomfret's 1977 review Research on Curriculum and Instruction Implementation set out a fidelity perspective on putting programs into practice: the degree to which an intervention is carried out as its designers intended. Dane and Schneider's 1998 review and Durlak and DuPre's 2008 Implementation Matters sharpened it into measurable parts such as adherence to the protocol, dosage, and quality of delivery, and tied higher fidelity to stronger program outcomes. Here fidelity rates how faithfully a planned intervention was delivered in the field, a property of a program in use, not an adolescent virtue or an overlap between quantum states.[5][6][7]
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